cosec$θ$এর পূর্ণরূপ কি? 

f(x) = 3cos |x| এর সীমা কত ?  

$\dfrac{\cos A}{1-\tan A} + \dfrac{\sin A}{1 - \cot A}$is equal to

If $\tan\theta=\dfrac{3}{4}$ and $0< \theta, < 90^0,$ then the value of $\sin\theta \cos \theta$ is

Evaluate

$\displaystyle \frac { \tan { A } +\sec { A } -1 }{ \tan { A } -\sec { A } +1 } ;$